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Results: 1 through 19 of 19 (1.133 secs)
You searched for: subject:"Habitability"
[texts]Understanding the Manager of the Project Front-End - Mulenburg, Gerald M
Historical data and new findings from interviews with managers of major National Aeronautics and Space Administration (NASA) projects confirm literature reports about the criticality of the front-end phase of project development, where systems engineering plays such a key role. Recent research into the management of ten contemporary NASA projects, combined with personal experience of the author in NASA, provide some insight into the relevance and importance of the project manager in this initial...
Keywords: HABITABILITY; EARTH (PLANET); PLANETS; EXTRATERRESTRIAL LIFE; ASTRONOMY; GALAXIES; SOLAR SYSTEM
Downloads: 60
[audio]Medea Hypothesis -- Groks Science Show 2009-08-19 - Charles Lee and Frank Ling
The Gaia Hypothesis suggests that the various lifeforms on earth interact to sustain the habitability of the planet. But, could the opposite be true? Is life on earth self-destructive? On this program, Prof. Peter Ward discussed the Medea Hypothesis.
Keywords: science; medea; gaia; environmentalism; ecology; geology; habitability; mass extinctions; groks
Downloads: 4,718
[texts]Quantitative Studies on the Propagation and Extinction of Near-Limit Premixed Flames Under Normal and Microgravity - Dong, Y.
The main objective of this research is to introduce accurate fluid mechanics measurements diagnostics in the 2.2-s drop tower for the determination of the detailed flow-field at the states of extinction. These results are important as they can then be compared with confidence with detailed numerical simulations so that important insight is provided into near-limit phenomena that are controlled by not well-understood kinetics and thermal radiation processes...
Keywords: COMPUTER PROGRAMS; VIDEO COMMUNICATION; EXOBIOLOGY; COGNITION; TELECONFERENCING; VIEWING; MULTIMEDIA; INTERNETS; HABITABILITY
Downloads: 64
[texts]Thermal Barrier and Protective Coatings to Improve the Durability of a Combustor Under a Pulse Detonation Engine Environment - Ghosn, Louis J.
Pulse detonation engine (PDE) concepts are receiving increasing attention for future aeronautic propulsion applications, due to their potential thermodynamic cycle efficiency and higher thrust to density ratio that lead to the decrease in fuel consumption. But the resulting high gas temperature and pressure fluctuation distributions at high frequency generated with every detonation are viewed to be detrimental to the combustor liner material...
Keywords: ACOUSTIC MEASUREMENT; COMMERCIAL OFF-THE-SHELF PRODUCTS; SPACECRAFT ENVIRONMENTS; ACOUSTICS; HABITABILITY; CONSTELLATIONS; DIMENSIONAL MEASUREMENT
Downloads: 76
[texts]Planetary Geology: Goals, Future Directions, and Recommendations - NON
Planetary exploration has provided a torrent of discoveries and a recognition that planets are not inert objects. This expanded view has led to the notion of comparative planetology, in which the differences and similarities among planetary objects are assessed. Solar system exploration is undergoing a change from an era of reconnaissance to one of intensive exploration and focused study. Analyses of planetary surfaces are playing a key role in this transition, especially as attention is focused...
Keywords: ARCHITECTURE; DESIGN ANALYSIS; RESEARCH MANAGEMENT; SPACE STATIONS; STRUCTURAL DESIGN; HABITABILITY; HUMAN FACTORS ENGINEERING; SPACECRAFT STRUCTURES; WORKSTATIONS
Downloads: 83
[texts]Fish and Wildlife Habitat Changes Resulting from Construction of a Nine-Foot Channel on Pools 24, 25, and 26 of the Mississippi River and the Lower Illinois River - Sparks, Richard E
The purpose of this report is to compare the fish and wildlife habitat in Pools 24 and 25 of the Mississippi River and Pool 26 of the Mississippi and Lower Illinois Rivers from before to after construction of the navigation dams. (Author)
Keywords: Ecology; Fishes; Wildlife; Rivers; Habitability; Mississippi river; Illinois; Plankton; Water quality; Vegetation; Illinois River
Downloads: 724
[texts]Documentation of digital computer programs for lunar landing dynamics system investigation - NON
No Abstract Available
Keywords: DRIFT; MICROBIOLOGY; NASA PROGRAMS; GULF STREAM; RESEARCH VEHICLES; UNDERWATER VEHICLES; CREWS; FLORIDA; HABITABILITY; LIFE SCIENCES; MAINTAINABILITY
Downloads: 205
[texts]Performance of Small (100-lb Thrust) Rocket Motors Using Coaxial Injection of Hydrazine and Nitrogen Tetroxide - Wasserbauer, Joseph F.
An investigation was conducted on a small (approximately 100-lb thrust) rocket using coaxial injection of hydrazine and nitrogen tetroxide. Characteristic-velocity efficiencies of 94 percent of the theoretical shifting equilibrium value were obtained at a chamber pressure of about 300 pounds per square inch using a 21-tube injector and a combustion chamber characteristic length of 10 inches. Performance at lower chamber pressures could be improved by reducing contraction ratio and thereby increa...
Keywords: HABITABILITY; EXTRATERRESTRIAL LIFE; EXOBIOLOGY; AEROSPACE ENVIRONMENTS; PLANETARY ENVIRONMENTS; THERMAL ENVIRONMENTS; SPACE EXPLORATION; DENSITY (NUMBER/VOLUME)
Downloads: 145
[texts]Cationic vinyl pyridine copolymers and products thereof - NON
Quaternized, cross-linked, insoluble copolymers of unsubstituted and substituted vinyl pyridines and a dihalo organic compound are spontaneously formed at ambient temperature on mixing the two monomers in bulk, in solution or in suspension. The amount of cross-linking may be varied according to the composition and reaction conditions. The polymer product exhibits ion exchange capacity and undergoes a reversible color change from black at a pH above 7 to yellow at a pH below 7...
Keywords: HUMAN FACTORS ENGINEERING; EXTRATERRESTRIAL RADIATION; HUMAN PERFORMANCE; RESEARCH AND DEVELOPMENT; AEROSPACE MEDICINE; HABITABILITY; SPACE FLIGHT STRESS; SPACECREWS; NASA PROGRAMS; MAINTENANCE
Downloads: 107
[texts]Fabrication and Testing of Ceramic Matrix Composite Propulsion Components - Effinger, Michael R.
A viewgraph presentation outlines NASA's goals for the Second and Third Generation Reusable Launch Vehicles, placing emphasis on improving safety and decreasing the cost of transporting payloads to orbit. The use of ceramic matrix composite (CMC) technology is discussed. The development of CMC components, such as the Simplex CMC Blisk, cooled CMC nozzle ramps, cooled CMC thrust chambers, and CMC gas generators, are described, including challenges, test results, and likely future developments.
Keywords: ARCHITECTURE; HUMAN PERFORMANCE; HABITABILITY; SPACE HABITATS; AEROSPACE ENVIRONMENTS; HUMAN FACTORS ENGINEERING; SPACECRAFT ENVIRONMENTS; LIFE SUPPORT SYSTEMS; PROVISIONING; INTRAVEHICULAR ACTIVITY
Downloads: 76
[texts]Chemical Mapping of Proterozoic Organic Matter at Sub-Micron Spatial Resolution - Oehler, Dorothy Z.
We have used a NanoSIMS ion microprobe to map sub-micron-scale distributions of carbon, nitrogen, sulfur, silicon, and oxygen in organic microfossils and laminae from the approximately 0.85 Ga Bitter Springs Formation of Australia. The data provide clues about the original chemistry of the microfossils, the silicification process, and biosignatures of specific microorganisms and microbial communities...
Keywords: LIFE SUPPORT SYSTEMS; PLANETARY PROTECTION; HABITABILITY; MARS EXPLORATION; ACTIVITY (BIOLOGY); EXTRAVEHICULAR ACTIVITY; HUMAN REACTIONS; SYSTEMS ENGINEERING; RESEARCH AND DEVELOPMENT; COORDINATION
Downloads: 152
[texts]Solutions Network Formulation Report. The Potential Contribution of the International GPM Program to the NOAA Estuarine Reserves Division's System-wide Monitoring Program - Hilbert, Kent
Data collected via the International GPM Program could be used to provide a solution for the NOAA Estuarine Reserves Division s System-wide Monitoring Program by augmenting in situ rainfall measurements with data acquired via future satellite-acquired precipitation data. This Candidate Solution is in alignment with the Coastal Management National Application and will benefit society by assisting in estuary preservation.
Keywords: PLANETARY SYSTEMS; COMPLEX SYSTEMS; SUN; HISTORIES; GALAXIES; EXTRASOLAR PLANETS; SOLAR SYSTEM; HABITABILITY; EARTH (PLANET); PHYSICAL SCIENCES; ANTHROPOLOGY; GEOLOGY
Downloads: 74
[texts]High-Resolution Spectroscopic Database for the NASA Earth Observing System Program - Rothman, Laurence S
The purpose of this project is to develop and enhance the HITRAN molecular spectroscopic database and associated - software to support the observational programs of the Earth observing System (EOS). In particular, the focus is on the EOS projects: the Atmospheric Infrared Sounder (AIRS), the High-Resolution Dynamics Limb Sounder (HIRDLS), Measurements of Pollution in the Troposphere (MOPITT), the Tropospheric Emission Spectrometer (TES), and the Stratospheric Aerosol and Gas Experiment (SAGE III...
Keywords: VOICE; SIMULATION; SPACE SUITS; SPACECRAFT CABINS; SPEECH; SENSORS; ROBOTICS; EXTRAVEHICULAR ACTIVITY; ARCHITECTURE (COMPUTERS); BIOINSTRUMENTATION; COMPUTER PROGRAMS; GLOBAL POSITIONING SYSTEM; HABITABILITY
Downloads: 92
[texts]Surface temperature thermal fluxmeters for shock tubes - Maulard, Jea
This article reviews the principle of the surface temperature thermal fluxmeter which is generally used for measurements in shock tubes. Pickups of this type are described; they were built and experimented upon at ONERA and enable heat flux measurements either on the wall or at the impact point of hemispherical models. The calibration of these fluxmeters raises a delicate problem and the processes used are dealt with in an in-depth study.
Keywords: ANALOGS; PSYCHOLOGICAL EFFECTS; SKYLAB PROGRAM; SPACE COMMERCIALIZATION; SUBMARINES; COMPARISON; HABITABILITY; HUMAN FACTORS ENGINEERING; SPACE STATIONS; SPACECREWS; ANTARCTIC REGIONS; OFFSHORE PLATFORMS; PHYSIOLOGICAL EFFECTS
Downloads: 52
[texts]Voltage-current-power meter for photovoltaic solar arrays - NON
A meter is disclosed for measuring the voltage, current, and power (VIP) parameters of a photovoltaic solar array, or array module, under sunlight operating conditions utilizing a variable load connected across the array and controlled by a voltage regulator which responds to the difference between the output voltage of the array and a programmed test voltage from a source which generates a single ramp voltage for measuring and recording current as a function of voltage, repeated ramp voltages a...
Keywords: SOIL SAMPLING; ENDOTHERMIC REACTIONS; MAGNETIC SPECTROSCOPY; HABITABILITY; WATER; FRAGMENTS; MARS MISSIONS; LANDING SITES; CALORIMETERS; TERRAIN; SOILS; GAS ANALYSIS; GAS DETECTORS; EXOTHERMIC REACTIONS
Downloads: 125
[texts]Application of the GRC Stirling Convertor System Dynamic Model - Regan, Timothy F.
The GRC Stirling Convertor System Dynamic Model (SDM) has been developed to simulate dynamic performance of power systems incorporating free-piston Stirling convertors. This paper discusses its use in evaluating system dynamics and other systems concerns. Detailed examples are provided showing the use of the model in evaluation of off-nominal operating conditions. The many degrees of freedom in both the mechanical and electrical domains inherent in the Stirling convertor and the nonlinear dynami...
Keywords: PLANETARY GEOLOGY; PRESSURE REDUCTION; WIND MEASUREMENT; PLANETARY MAPPING; PAYLOADS; HABITABILITY; RIGID STRUCTURES; PROPELLERS; WIND (METEOROLOGY); INFLATABLE STRUCTURES; MARS SURFACE; SPACE ERECTABLE STRUCTURES; EXOBIOLOGY; LOW COST; MARS ENVIRONMENT
Downloads: 105
[texts]SPACE BIOLOGY AND MEDICINE - NON
SPACE PSYCHOLOGY AND PHYSIOLOGY, LIFE SUPPORT SYSTEMS, RADIOBIOLOGY, ACCELERATION TOLERANCE, MEDICAL DIAGNOSTICS BY COMPUTER, ASTRONAUT SELECTION, AND HYPOKINESIA PREVENTION
Keywords: ACCELERATION TOLERANCE; LIFE SUPPORT SYSTEMS; NUTRITION; PERSONNEL SELECTION; PREVENTION; RADIOBIOLOGY; SPACE PSYCHOLOGY; ACCELERATION TOLERANCE; AEROSPACE MEDICINE; LIFE SUPPORT SYSTEM; PERSONNEL SELECTION; AEROSPACE MEDICINE; RADIOBIOLOGY; ANIMALS; ASTRONAUTS; DIAGNOSIS; EXOBIOLOGY; HABITABILITY; HYPOKINESIA; HYPOXIA
Downloads: 285
[texts]Nerve control of the tempo of motion in man and possible methods of representing time in the nervous system - Rokotova, N. A
Control of tempo of motion and possible methods of representing time in nervous system
Keywords: AEROSPACE MEDICINE; HABITABILITY; HUMAN BEHAVIOR; LEARNING; LIFE SUPPORT SYSTEMS; OCULOGRAVIC ILLUSIONS; PHOTOSYNTHESIS; PSYCHOMOTOR PERFORMANCE; SENSORY PERCEPTION; TOXICITY; U.S.S.R; ASTRONAUT PERFORMANCE; WASTES; WEIGHTLESSNESS; HUMAN FACTORS ENGINEERING; MAN MACHINE SYSTEMS; SPACE FLIGHT; BIODYNAMICS; CLOSED ECOLOGICAL SYSTEMS; ECOLOGY; EXOBIOLOGY
Downloads: 62
[texts]Limb-darkening functions as derived from along-track operation of the ERBE scanning radiometers for August 1985 - Smith, G. Louis
During August 1985, the scanning radiometers of the Earth Radiation Budget Experiment aboard the Earth Radiation Budget Satellite (ERBS) and the NOAA-9 satellite were operated in along-track scanning modes. These data were analyzed to produce limb darkening functions for Earth-emitted radiation, which relates the radiance in any given direction to the radiant exitence. Limb darkening functions are presented and shown as figures for day and night for each spacecraft...
Keywords: COMBUSTION; SPACE STATION FREEDOM; SPACE STATIONS; TOXICITY; CANS; CARBON; CONSERVATION; DIAGNOSIS; ESTIMATING; FLEXIBILITY; HABITABILITY; CONTAINMENT; MIXING; NITROGEN; PROTOTYPES; STANDARDIZATION; UTILITIES; VAPORS; CRITICAL EXPERIMENTS; FIRE EXTINGUISHERS; FIRE FIGHTING; FIRES; IGNITION; MICROGRAVITY; OXIDIZERS
Downloads: 64
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